Castle Minerals snaps up bonanza-grade West African gold play

Castle Minerals’ geologists conducting reconnaissance across the highly prospective Niellé gold project, highlighting ease of access to the prospective site.

Castle Minerals (ASX: CDT) has pounced on a transformational West African deal, securing a binding agreement to snap up a 90 per cent interest in the high-grade Nielle gold project in northern Côte d’Ivoire. The savvy acquisition hands the explorer a demonstrated high-grade discovery in a tier-one gold district, instantly positioning Nielle as the company’s new flagship asset.

Nielle spans a hefty 212-square-kilometre slice of the richly endowed Birimian greenstone belt and, when bolted onto Castle’s existing 1842-square-kilometre landholding and applications in Côte d’Ivoire, gives the company serious district-scale exploration firepower in one of West Africa’s hottest gold corridors.

A new exploration application is underway and should be granted in the coming weeks. The company says the asset attracted strong interest from multiple parties, with Castle’s experienced in-country team winning the day.

The new hunting ground sits in a well-endowed regional corridor just 50 kilometres north of the five-million-ounce Tongon gold mine and along strike from major discoveries, including Pereus Mining’s Sissingué deposit with its 1.5 million ounces and Endeavour Mining’s Wahgnion mine, home to 3.2 million ounces of gold.

Previous exploration at Nielle has already mapped a compelling gold system over more than one kilometre of drilled strike, nestled within a broader 4.5-kilometre mineralised corridor that remains wide open along strike and at depth.

Earlier work included extensive geochemical sampling and a 7000-metre air-core drilling blitz that led to the initial discovery of an extensive gold anomaly. The shallow nature of the project is also backed by some stellar historical reverse circulation drilling results.

Top drill hits included a standout 5-metre strike, clocking 15.42 grams per tonne(g/t) gold from just 7m, featuring a richer 2-metre zone running at an eyewatering 31.54g/t gold from 8m.

Another hole delivered 13m at 5.07g/t gold from 12m, including 3m grading 16.33g/t gold from 13m. Not to be left out, a third hole produced 9m at 4.33g/t gold from 86m, showcasing 2m going 16.88g/t gold from 88m.

Broad zones of consistent gold mineralisation have further underlined the scale potential at Nielle, with standout hits such as 26m grading 1.95g/t gold from 32m, featuring 4m at 5.51g/t from 42m, and another hefty 26-metre strike running 1.79g/t from 108m, including a higher-grade 2-metre core grading 6.07g/t from 110m.

Nielle represents a rare opportunity to secure a high-grade gold project with demonstrated scale and immediate upside in a tier one jurisdiction.

Castle Resources Managing Director Steve Zaninovich

The company says that the shallow, high-grade nature of the deposit should enable quick resource definition, with the project still offering enormous upside given the limited historical drilling relative to the system's sheer scale. This leaves clear opportunities to expand the known mineral zone across the entire corridor.

Notably, Castle is not arriving in Côte d'Ivoire as a newcomer. The company has deep roots in the region. It’s in-country project and business development manager Mohamed Niaré, has spent more than 25 years operating in Mali and Côte d'Ivoire, building relationships and local expertise. That regional knowledge gives Castle a valuable operational edge in West Africa, where trusted local networks and in-country capability can often prove just as important as the geology itself.

To clear the decks for its new focus, Castle is optimising its portfolio by divesting its Ghanaian gold assets. The company has signed an indicative terms sheet to sell its wholly owned Ghanaian subsidiary, Carlie Mining, for US$400,000(A$552,000). US$250,000 (A345,000) will land in its bank account as soon as the share purchase agreement is signed, with the balance following two months later.

This quick and clean exit allows the company to rapidly recycle that capital straight into the ground in Côte d'Ivoire.

Closer to home, Castle maintains its dominant 184-square-kilometre Meeka South gold project in Western Australia’s storied Murchison gold district, strategically positioned near Westgold Resources’ Bluebird mill and surrounded by a string of established gold operations.

Castle says its next step is to fast-track Nielle towards a maiden mineral resource estimate. Management is already in advanced discussions to acquire the historical data package to complete a detailed technical review, which will be used to design a targeted infill and step-out drilling campaign.

With a proven high-grade discovery already in hand, a massive underexplored mineralised 4.5km corridor and drill-ready upside stretching in every direction, Castle looks to have landed itself a genuine company-making opportunity in one of the world’s hottest gold jurisdictions.

If the upcoming drilling can successfully extend the known zones and convert historical hits into a maiden resource, Nielle could quickly emerge as one of the more closely watched junior gold stories in West Africa.

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